<template>
  <div class="login">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">{{$appTitle}}</h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" type="text" auto-complete="off" placeholder="账号">
          <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter.native="prepareLogin"
        >
          <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>

      <el-form-item prop="code" v-if="captchaOnOff && captchaPlugin">
        <CaptchaVerification v-if="isAjCaptcha"
          @success="onCaptchaSuccess"
          @error="onCaptchaError"
          mode="pop"
          :imgSize="{ width: '330px', height: '155px' }"
          ref="ajCaptcha"
          :captchaType="captchaType === 'default'? 'blockPuzzle' : captchaType "
        />
        <template v-else>
          <el-input
            v-model="loginForm.code"
            auto-complete="off"
            placeholder="验证码"
            style="width: 63%"
            @keyup.enter.native="prepareLogin"
          >
            <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
          </el-input>
          <div class="login-code">
            <img :src="codeUrl" @click="getCode" class="login-code-img"/>
          </div>
        </template>

      </el-form-item>
<!--      <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>-->
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="medium"
          type="primary"
          style="width:100%;"
          @click.native.prevent="prepareLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div style="float: right;" v-if="register">
          <router-link class="link-type" :to="'/register'">立即注册</router-link>
        </div>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2016-{{new Date().getFullYear()}} </span>
    </div>
  </div>
</template>

<script>
import { getCodeImg, getCaptchaConfig } from "@/api/login";
import Cookies from "js-cookie";
import { encrypt, decrypt } from '@/utils/jsencrypt'
import CaptchaVerification from '../components/CaptchaVerification'
export default {
  name: "Login",
  components:{
    CaptchaVerification
  },
  data() {
    return {
      codeUrl: "",
      cookiePassword: "",
      loginForm: {
        username: "",
        password: "",
        rememberMe: false,
        code: "",
        uuid: ""
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", message: "请输入您的账号" }
        ],
        password: [
          { required: true, trigger: "blur", message: "请输入您的密码" }
        ],
        code: [{ required: true, trigger: "change", message: "请输入验证码" }]
      },
      loading: false,
      // 验证码开关
      captchaOnOff: true,
      captchaPlugin: '',
      // 注册开关
      register: false,
      redirect: undefined,
      captchaType: 'blockPuzzle',
    };
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect;
      },
      immediate: true
    }
  },
  created() {
    this.initCaptcha();
    this.getCookie();

  },
  computed:{
    /**
     * 是否为aj验证码
     * @returns {string|boolean}
     */
    isAjCaptcha(){
      return this.captchaPlugin && this.captchaPlugin.toLowerCase() === 'aj'
    }
  },
  methods: {
	// 获取图片验证码
	getCode() {
      getCodeImg().then(resp => {
        this.captchaOnOff = resp.captchaOnOff === undefined ? true : resp.captchaOnOff;
        if (this.captchaOnOff) {
          if(resp.img.indexOf('data:image') != 0){
             resp.img = "data:image/gif;base64," + resp.img;
          }
          this.codeUrl = resp.img;
          this.loginForm.uuid = resp.uuid;
        }
      });
    },
    /**
     * 准备登录
     */
    prepareLogin(){
      if(this.captchaOnOff && this.$refs.ajCaptcha){
        this.$refs.ajCaptcha.show()
      }
      else{
        this.handleLogin();
      }

    },
    // 验证码成功回调
    onCaptchaSuccess(params) {
      this.$set(this.loginForm, 'code', params.captchaVerification)
      this.handleLogin();
    },

    // 验证码失败回调
    onCaptchaError() {
      this.form.captchaVerification = ''
      this.form.captcha = ''
      this.$message.error('验证码验证失败，请重试')
    },
    initCaptcha(){
      getCaptchaConfig().then(resp => {
        this.captchaOnOff = resp.onOff;
        this.captchaPlugin = resp.plugin;
        this.captchaType = resp.captchaType

        if(this.isAjCaptcha){
          //TODO
        }
        else{
          this.getCode();
        }
      })
    },
    getCookie() {
      const username = Cookies.get("username");
      const password = Cookies.get("password");
      const rememberMe = Cookies.get('rememberMe')
      this.loginForm = {
        username: username === undefined ? this.loginForm.username : username,
        password: password === undefined ? this.loginForm.password : decrypt(password),
        rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
      };
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true;
          if (this.loginForm.rememberMe) {
            Cookies.set("username", this.loginForm.username, { expires: 30 });
            Cookies.set("password", encrypt(this.loginForm.password), { expires: 30 });
            Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 });
          } else {
            Cookies.remove("username");
            Cookies.remove("password");
            Cookies.remove('rememberMe');
          }
          this.$store.dispatch("Login", this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || "/" }).catch(()=>{});
          }).catch(() => {
            this.loading = false;
            if (this.captchaOnOff && !this.isAjCaptcha) {
              this.getCode();
            }
          });
        }
      });
    }
  }
};
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login-background.jpg");
  background-size: cover;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;
  .el-input {
    height: 38px;
    input {
      height: 38px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.login-code {
  width: 33%;
  height: 38px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.login-code-img {
  height: 38px;
}
</style>
